BMW 3 (2012 – 2018) F30 F31 F34 F80 fuse and relay

The BMW 3 F30 is the sixth generation of the BMW 3 series, which first hit the market in 2012. The lineup includes the F30 sedan, the F31 station wagon, and the F34 sloping roof model, as well as the M3 – F80, which was produced in 2013, 2014, 2015, 2016, 2017, and 2018. This text gives you the lowdown on where the fuse and relay boxes of the BMW F30 are located, including diagrams and photo examples. Also we focus on the cigarette lighter fuse.


The assignment of fuses and relays may differ from that shown, depending on the year of manufacture and the level of electrical equipment.

Engine compartment

Fuse and relay box

It is located under the hood, on the right side of the engine compartment, closer to the windshield. To access, remove the protective cover.

block-under-hood f30





1815A Diagnostic connector
1910A Engine control
205A Audio control unit, roof electronics
215A Control unit
227.5A Door locks
Passenger rearview mirror, interior lighting
2310A DDE main relay
24Electronic automatic transmission (EAT) control unit, 4*4
255A Touchbox, audio
Body control unit, abs, praking
265A Seat heating
2710A Driver/passenger seat lumbar support valve block, driver/passenger side seat adjustment switch block
285A Front left lamp
Front right lamp
Rain sensor
Interior lighting
295A Coolant pump
32Transfer box, security system
3315A Coolant pump
Air conditioning compressor
Additional water pump
3410A Safety system, seat belt
4015A Headlights, outdoor lighting, dimensions
42Electrochromic rearview mirror
445A Driver support systems based on a video camera, active steering system
455A Cruise control
465A Crankcase ventilation heater
Coolant shut-off valve, louvre
475A Night vision electronics (NVE), vehicle sound generator (VSG)
4810A Steering column switches
505A Instrument cluster
527.5A Instrument cluster
535A Glove box lighting, instrument panel trim strip lighting (driver/passenger side), instrument panel trim strip lighting on driver’s side, driver/passenger footwell lighting
547.5A Selector switch
555A Electronic power steering (EPS)
565A Air quality sensor, ventilation system
5740A Fuse box, Headlights, outdoor lighting, dimensions
5830A Dynamic Stability Control (DSC)
6230A Retractable roof
6330A Transfer box
6420A Front passenger seat heating module
6520A Driver seat heating module
6620A Cigarette lighter
6730A Driver’s seat control unit
Driver seat adjustment
6830A Passenger seat adjustment
Passenger seat control unit
6920A 12V socket
7020A Heating

Fuses 66 and 69 for 20A are responsible for the operation of the cigarette lighter.

Power fuse box

A power fuse box is installed next to the fuse and relay boxes


Diagram 2


  • FL1 – 50/80/125A Trip relay
  • FL2 – 125A Electronic power steering (EPS)
  • FL3 – 100A Additional heater
  • FL4 – 40A Heated fuel filter
  • FL5 – 40A Dynamic Stability Control (DSC)
  • FL6 – 40A Fan motor

Relays and fuses of the DDE unit and a 50A fuse for the coolant pump, relay of the electric fan K5 can also be installed nearby.

additional elements under the hood

Passenger compartment

Fuse box

Fuse and relay box is located on the A-pillar on the passenger side.

block in the cabin

general scheme


  1. 54 pin connector
  2. 12 pin connector
  3. 42 pin connector
  4. 54 pin connector
  5. Circuit breakers
  6. Connector (1-pin, plus terminal)
  7. Relay
  8. 54 pin connector
  9. 54 pin connector
  10. 54 pin connector







430A Passenger Power Window
520A Central locking
630A Power window driver
105A Control panel
Driver assistance system
Heating, ventilation and air conditioning (HVAC)
Light switch
117.5A 5Rear module
Left headlight
127.5A Diagnostic connector
135A Telematics
1415A Horn

Relay :

  • driver’s power window
  • front power window
  • central locking
  • headlight washers
  • starter
  • horn horn
  • wiper at speed 1/2.

Luggage compartment

Fuse and relay box

There can be three fuse boxes in the luggage compartment. Two blocks (power fuse box and fuse box) are located behind the casing on the right side, near the battery.

Photo 6


The other is centered under the covery. More details in the video below.

2 block in the trunk

Your exact fuse diagram is folded under the boot floor, inserted into a special place on the top fuse box (rolled paper). We provide one of the versions for review.




description-of-fuse blocks bmw f30

Power fuse box


Photo 5

  1. 50A Rear module
  2. 100A Fuse box
  3. 100A Power Distribution
  4. 125A Main relay
  5. 125A Integrated power module

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Comments 6

  • Thank you so much for this info. Without the diagram of the FEM unit I would not have been able to solve my central key locking problem.

  • Hello, I was wondering if you know where and what number is the fuse responsible of the driver master switch and the fuse for the idrive controller for 2014 BMW 328i XDrive.

    Thank you

  • Do you no which relay works the horn as it works sometimes so not a fuse thanks

  • I am stumped, mechanic changed out my trubo charger on my 2015 BMW 320i & took it on a test drive without bleeding the system. The car never ran out of antifreeze but did overheat a bit but never released antifreeze , the waterpump is now not getting power. I have checked all fuses, connections & battery power distribution all checked out good. I have tried to bleed the system with no luck. Please any suggestions would be greatly appreciated. Once again thank you!

  • could someone please tell me if the back turn signal has a fuse? I check the wire n the back and I don’t get a signal. please help me. the diagram does not say what is each fuse. the pictures are not very clear. or where could I get the fuses list ?

    • Did you ever solve this.
      I’m having an issue with my rear turn signals. All other light functions work brake, caution… Turn signals on both sides just stopped working.

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